Pipe-coupling.



PATENTED FEB. 6, 1906.

' A. W. GRAHAM.

PIPE COUPLING. APPLICATION FILED APR.18, 1905.

glwcnfoz ANDREW "WALTER GRAHAM, OF BRADFORD, PENNSYLVANIA, ASSIGNOR OF UNE-HALF TO LEWTS E. MALLURY, OF BRADFORD, PENNSYLVANIA.

eu n oueiune.

, without danger of leakage.

Specification of Letters Patent.

Patented Feb. 6, 1906. A

Application filed April 18, 1905. Serial No. 256,281.

vide a coupling-sleeve and packing of such nature as to permit bending of the pipeline at joints Without injury to the packing and A still further object of the invention is to provide a novel form of packing formed in suchmanner that the operation of assembling a coupling will adjust the packing to proper position;

- With these and other objects in view, as will more fully hereinafter appear, the invention consists in the novel construction and arrangement of parts hereinafter described,

- illustrated in the accompanying drawings,

and particularly pointed out in the appended clain1s,-.it being understood that various changes in the-form and proportions of parts may be made. without departingfrom the spirit or sacrificing any of the advantages of the invention. i

in the accompanying drawings, Figure 1 is a sectional elevation of a pipe-coupling con structed in accordance with the invention.

Figs. 2, 3, and 4 are similar views of portions of conplings,illustrating modifications of the invention. Fig. 5 is a detail view showing the manner in which the packing is placed in position.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the drawings.

The coupling forming the subject of thepresentinvention is designed for general application and is of especial value in pipe-lineswhere the pipe must be laid. on a more or less uneven surface and where some flexlbihty at the joints is desirable.

The pipe-sections 10 are in the form of simple straight cylinders without the usual bell or other integral coupling members. Adj acent pipe-sections are entered in the opposite ends of a coupling-sleeve 11, which may be formed of wrought or cast metal or other ma terial. The central portion of this sleeve is provided with one or more inwardly-protrudmg lugs, knobs, or enlargements 12, which may be formed by upsetting the metal from the outer side of the sleeve if the latter is-malleable or by forming the lugs thereon if the sleeve is cast. These lugs serve as means for centering the sleeve on the two pipe-sections to be coupled, said lugs preventing excessive movement'in either direction, but yielding or breaking under excessive strain, so that when necessary a coupling-sleeve. may be driven off by a mall or other tool when a broken sleeve or pipe-section is to be replaced. The op 0* site end portions of the sleeve are reduced in diameter, being entwined to form annular.

flanges 14, against which packing-rings 15 are seated. Each packing-ring has an annular groove 16, into which the flange 14 enters, and this groove acts in a measure to divide the packingring into inner and outer portions 17 and 18, the inner portion seating against the inner face of the flange 14 and being-held tight by the pressure of fluid in the pipe, while the outer portion 18 fits over the outer end of the sleeve and is held in place by a compression-ring 20, having an inclined inner face for engagement with the packing. The rings 20 are of cast or other metal and are rigidly clamped together by bolts 21, passing through openings in the rings.

In introducing the packing-rings the outer portion 18 is stretched over the end of the pipe-section, as shown in Fig. 5, the inner portion 17 hanging loose at the The pipe is then introduced within t e sleeve, and as the grooved face 16 of the ring strikes the flange 14 of the sleeve the ring will be stopped, and on continued movement ofthe ipe the irmer portion 17 of the ring will be orced up into the space in the rear of the flange 14c and will form the inner acking.

Should it be desired to flex tlie pipe, as when running a pipe-line over an uneven sur-' face, one of the sections is drawn slightly outipe end.

loo

'warduntil its end is clear of the central'portion of the sleeve, after'which the ipe may be turned to the desired angle. With an ordinary coupling this operation would compress the acking at the inner side of the bend and W0 leave the packing at the outer side loose, soon resulting in leakage. In the pres-- sleeve and packing embodying the invention and do not require detailed description.

With a coupling of the character described the packing is held on one side by the pressure of the fluid within the pipes and on the outer face is tightly com ressed by the rings and pac 20, so that, being acke on both sides, there is'no danger of lea age.

Having thus described my invention, what I claim, and desire to secure by Letters Pat- 611i), l

1. In a ipe-coupling, a sleeve havin in turned end ortions, packing-rings in w 'ch the ends oft e sleevevare'embedded and compression means acting against the outer faces of the rings. A

w 2. The combination in a pipe-coupling, of a couplin -sleeve having inturnedend portions, g members extending between the inner face ofthe sleeve and the exterior of the pipe sections, the packing also extending overv the ends of the sleeve, and a compression means-acting against the outer portion of the packing.

3. In a pipe-coupling, a sleeve having opposite end portions of reduced diameter, andpacking members leading over such end portions, said packing members bei'ngadapted V to'b'e forced into place by the introduction of a pipe section within the sleeve. 4. Inapi e-coupling,acoupling-sleevehaving reduce end portions, a packing-ring hav-- ing a central annular oove for the reception of the end portion of t e sleeve, the inner portions of the ringbeing forced within the clamping ring engaging the outer face of the I pac g-rmg. j a

6. In a pipe-coupling, a coupling-sleeve having its central portion provided with projections to be introduced between the adja=- cent ends of the pipe-sections to be con led,

the opposite ends of the sleeve bein re need in diameter, packing-rm s grooved or the reception of the ends of t esleeve, and comressionmembers acting against the outer aces of the rings.

7. In a pipecoupling, a sleeve having inturned end portions, and packing-rings grooved for the reception of said end portions and disposed both inside and outside of said inturned ends.

'8. In a pipe-coupling, the combination with ipe-sections, of a sleeve having en large portions to permit flexing of the pipeline, and duplex packing-rings fitting against A In testimony whereof I aflix my signature 8c in presence of-two subscribing witnesses.

I ANDREW WALTER GRAHAM, Witnesses:

ALBERT PoPKINs, BENNETT S. JoNEs. 

